TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley
TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley
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TOI-1468:由两个凌日行星组成的系统,一个是超级地球,一个是迷你海王星,位于半径谷的两侧
DOI:
10.1051/0004-6361/202244056
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发表时间:
2022
影响因子:
6.5
通讯作者:
Caballero, J. A.
中科院分区:
文献类型:
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作者:
Chaturvedi, P.;Bluhm, P.;Nagel, E.;Hatzes, A. P.;Morello, G.;Brady, M.;Korth, J.;Molaverdikhani, K.;Kossakowski, D.;Caballero, J. A.
We report the discovery and characterization of two small transiting planets orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (Pb= 1.88 d), has a planetary mass ofMb= 3.21 ± 0.24M⊕and a radius ofRb=R⊕, resulting in a density ofρb= g cm−3, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (Pc= 15.53 d), we derive a mass ofMc=M⊕,aradius ofRc= 2.06 ± 0.04R⊕,and a bulk density ofρc=g cm−3, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.
DOI:
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发表时间:
2019
期刊:
影响因子:
--
作者:
A. Hatzes
通讯作者:
A. Hatzes
DOI:
10.7788/boehlau.9783412217204.127
发表时间:
2021
期刊:
Rassismus. Macht. Vergessen.
影响因子:
--
作者:
Robert Andreasch
通讯作者:
Robert Andreasch